/usr/share/man/fr/man7/latin9.7.gz is in manpages-fr 3.57d1p1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/fr/man7/iso_8859-15.7.gz
/usr/share/man/fr/man7/iso_8859-15.7.gz